These both look like VSTS infrastructure falling over on PRs:
I don't see anywhere that gives information about the failures. (*)
These CI failures on different platforms are both for the same change, on different branches, for a documentation only change. That passed on the other branches and platforms for the same change.
-gps
(*) I refuse to "Download logs as a zip file". I'm in a web browser, if the information I might need is potentially buried somewhere in a zip file of logs, that is a waste of my time. I'm not going to do it. The web UI needs to find and display the relevant failure info from any logs directly.